the.com/propellant
controlled fury that turns a tank of chemistry into a fist against gravity
means A substance that produces motion by expanding, burning, or releasing pressure — the fuel-and-oxidizer mix that pushes a rocket up or the gas that drives the spray out of an aerosol can.
from From the Latin propellere, "to drive forward" — pro- "forward" plus pellere "to push, beat, drive" (the same pellere that pushes its way into expel, repel, and compel). It entered English by way of "propel," and the -ant ending marks it as the thing doing the propelling, the agent of the shove.
- cold trick
- some need igniting; others detonate the moment they touch
- hard limit
- chemical rockets max out near 4.5 km/s exhaust
- mass tax
- rockets are mostly fuel by weight, barely cargo
- weird fuels
- early Soviets tested fluorine, the most reactive element alive
- aerosol cousin
- the same physics puffs your spray paint and deodorant
rp-1 rocket fuel — kerosene-based propellant used in saturn v rockets that sent humans to the moon in 1969
hydrazine — monopropellant used to power satellite thrusters and spacecraft attitude control systems across all space agencies